T-Mobile teasing "bright lights" for June 28

T-Mobile employees were greeted this week with a mysterious image in their inboxes promising "bright lights" coming on June 28. We really haven't the foggiest what that could mean, but it does line up nicely both with rumors that the company is getting ready for a branding realignment and also with the imminent release of the Magic / myTouch 3G, especially considering that all staff members are being required to complete some form of Google training by the 19th of this month. Any other juicy ideas?